But more importantly are the profile of the tire's which is 225 55 17 which clears the struts, the recommended size is 225 50 17 and my current set up is the same size found on the base wheels of a F10 528i and provides a taller profile of 26.7 inches vs 25.9 (stock 225 45 18), some of the benefits are higher ground clearance for the snow and greater absorbance of damaging potholes.